Microbiology Exam 5: Epidemiology
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7 terms
Terms | Definitions |
|---|---|
 epidemic | disease outbreak infection many people within a short period of time. |
| index case | first case in an epidemic |
| endemic | disease that is always present in a population at roughly the same level |
| case-control study | interview cases to find similarities interview controls to find out differences used to identify the source of the epidemic |
| herd immunity | prevention of epidemics due to scarcity of susceptible hosts (non vaccinated are protected by those who are vaccinated) most need to be immune/vaccinated. (germ cant spread) |
| Herd Immunity in Japan | influenza in Japan school-aged had to be vacc. protect old people caused mortality rates to drop. cases increased when vacc. stopped |
| common source v propagated | common: food, water propagated: one individual starts epidemic |
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